Cow-milking machine.



A. VVRACKSTRAW. cow MILKING MACHINE.'

I .APPLICATION FILED JULY 9, |914; 15,144,380, Patented M1929, 1915.

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' lz's 2.7222122537 ALBERT vieron RACKSTRAW, orrnnroan, omo, As's1eNon,. BY MEsNE- ASSIGN- MENTS, To man MEcHANicAL' DnvELorMnN'r COMPANY.

coW-MILKING Milicnlm.A

maltese.

T0 all whom it may concern Beit known that I, ALBERT VICTOR RACE. s'rRAW, av subject of the Kingl of Great Britain, residing at Bedford, in the county of Cuyahoga,- State of Ohio, have invented ceI'-,

tain new and `useful Improvements in Cow- -Milking"Machines, of .which the following is that is operated in connection with any simf ple type of. singleacting suction pumplfor milking-one cow, or in connection with- `a duplex suction pump for two cow milking;

In both cases the functions of the operative parts, and the mechanical principles vare the Same.

The invention further resides in the specific form of teat cup used, and still further in the manifold connection for the teat cups. With these and other features in view the invention consists in the construction,y arrangement, and combination of parts, an`

embodiment of which isillustrated in the Vaccompanying drawings in which 'similar characters .are employed to designate similar parts in the several views.-

v In the drawingsFigurel illustrates an VVVembodiment of the improved apparatus,

adapted for milking two cows simultaneously. Fig. 2 is a view of the double'milker construction, partially in- Acentral, vertical Fig. 6.A Fig. 6 is a section on line 6- 6. Fig`.

5. Fig. 7 is anend view ofthe manifold.

Fig. 8l is a central, vertical section 'of one of the -teat cups, Jand `Fig. 9 Vis an underside 'is an underside view of same.

Specification of 'Letters atent.` if Patentd June 29, 1915, y Application filed July 9, 1914. SerialNo. 849,877. v I

view of same. Fig. 10 a central, vertical sectlon of the gland or teat retainers, in its contracted or normal condition, -and Fig. ,1I

vIn Fig. 1 the operative means for the improved milker is illustrated more or less dia-- grammatically, l and. 2 representing two `,cylinders of a double acting suction pump, the pistons of which .are actuatedby thehand lever 3f Suitable connections 4 and 5 (preferably rubber hose) are made between the cylinders' land `2 and the'nozzles 6a and '6b respectively, ofthe member 6. The mem-l herG comprises a casing, Vmade 'preferably in vtwo parts 6c and 6d, for sanitary reasons and forconvenience of manufacture. The noz' zles`6aand 6b provideterminals for ports 6e and Gf, whichv connect with a valve barrel 6g. Two chambers 6h and 6i also have open connectionwith the barrel 6g, as shown at 61. Intake ports 6k, one of which is shown in Figs '2 and 3, enter the chambers@J and 6.x'

through the stems -61 andl-n. lOpenings 6 connect the `chambers 61 vandGm with the ports 6"- and Gf. v

The member 6 is adapted to attachment to the cover 7a of a ysui-table receptacle 7, lthe `barrel (gbein'g provided with an elongated opening`6 communicating with the interior` of said receptacle. The barrel 6g contains a sliding valve member 8, and is provided .with stops 9a and 9", which govern the distance of travelof the valve 8. The stops justed by screws 9c and 9d. It will readily be seengthat suction created by the pump, and acting through' the port 46e will `draw the valv'e Sito the stop 9, thereby -closing'vthe open connection between fthe.'

chamber Ghiand the receptacle 7, and creating, through the opening 6 `vacuum m said chamber 6h,v and consequent'y suction through port 6k,vresu lting in drawing the milk from vthe cowinto the chamber?, through the means hereinafter described.

can-be ad- Whilethe suction action, above described, l Y

is taking place in connection with the chamberah, the chamber 6i is receiving thebenet of. the reverse, or exhaust action and dis-- chargingthe milk that has been drawn into said chamber 6*, by the previous suctionstroke, through the openings 6j and 6 into the receptacle 7 This arrangement eliminates the back pressure on the teats, as the openings 6j and 66 provide an outlet for the air that would otherwise be compressed, and cause a back pressure through the teat con "nections This is an important feature, as

it hasbeen found that the back pressure is 410 injurious to the cow.

l5 metal sleeve provided with an annular flange 10a and an externally threaded rim 10b. An internally threaded cap 11, having an'opening 11L therein, isadapted to be threaded 'onto the rim 10b. The teat holder consists of a soft, flexible rubber thimble or gland 12, shaped substantially as shown in Fig. 10, contracted at its lower end varound a small opening 12, and provided with a bead 12b, Vwhich furnishes the means for retaining the gland in the teat cup, the

bead being clamped between the flange 10a .and the cap 11, as shown in Fig. 8. The

. t elasticity of the rubber admits of the eX- pansion of the opening 12a, thereby making the gland automatically adjustable to' any size of teat, and causing it to fit snugly to the teat, making an air tight connection therewith.

The teat cups are connected by means of rubber hose 13, with a manifold member 14. The manifold member comprises a tubular core 14a. Circumscribing the core 14 is a series of collars 14", corresponding in number to the number of teat cups used,

these collars are provided with tubular I stems 14c which are adapted to register 'with ports 14d in the core 14, when the dey vice is in operative position. The hose 13 is connectedA with the stems 14". The ports 14d are preferably staggered, and the collars 14b have a ground it on the core14a. A

dividing or stop bar 14 is provided as a means for insuring the registration of the stem openings with the staggered ports 14d ,when in operative position.

When it isv desired to put any one or more of the'teat connections out of commissiom as for example in milking a three teat cow, the collar 14, of the connection elected to be 55,disconnected, is turned on the core 14a, to the position shown by broken lines in Fig.

. 6, this closes the port 14d and shuts off the suction.

Hose connection 15 is provided from the manifolds 14 to the stems 61 and 6 1 of the member 6. thereby providing open communication from the 'teat cups to the chambers 6h and 61 of the member 6.

Referring to Fig. 4, whichv illustrates an pump. The member 6b is eliminated and the members 6g and 8 perform the same functions as the members g'and 8.

The foregoing specification applies` to the apparatus as illustrated in the accompanying drawings, but it is to be understood that 'I am not restricted to this specic construction, only so far as limited by the claims and the existing state of the art.

What I claim and desire to secure by Letters Patent is 1. In an apparatus for the purpose described, the combination of an air-pump; a milk receptacle; an operating member adapted to be connected with the milk receptacle; connecting means between said operating member and the airepump, the

operating member comprisinga casing prov vided with a port opening into said connecting means, a chamber, a valve barrel, an opening fromv the' port into the chamber, an opening from the port into the valve barrel, an opening from the chamber. into the valve barrel, an opening from the valve barrel into the milk receptacle, and a valve in the barrel for closing and opening the openings in said barrel; a series of teat cups; and connections between said teat clups and the chamber in the operating memf 2. In an apparatus for the purpose described, the combination of a double acting air-pump; a milk receptacle; an operating member adapted to be connected with the milk receptacle; connecting means between said operating member and the two cylinders of the air-pump for creating alternate suction and compression in the operating member, said operating member compris- 4ing a casing provided with ports openinginto said connecting means, twochambers, a valve barrel, openings from the ports into the chambers, openings fromthe ports into the valve barrel, openings from the chambers into the valve barrel, an opening from v1,144,330 I Q tween said teab cups and the manifold the ere, whereby. 'said ports may be closed; member, said manifold member comprising and connecting means between the manifold a tubular lcore having a series of collars and the suction member.

mounted thereon,`said collars 'being pro- ALBERT VICTOR'RACKSTBAV. 'vided with nipples, ports. in the core ar- Witnesses:

- ranged to register with the openings in the FRED C. SGHLATTER,

nipples, and the collars being revoluble on L'. F.'GR1SW0LD. 

